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Renewables Supply 10 Percent of U.S. Energy - 1 views

www.cleantechblog.com/...gy-supplies-10-percent-of.html renewables USA
shared by Colin Bennett on 06 Jan 10 - No Cached
  • According to the most recent issue of the “Monthly Energy Review” by the U.S. Energy Information Administration (EIA), renewable energy (i.e., biofuels, biomass, geothermal, hydroelectric, solar, wind) provided 10.51% of domestic U.S. energy production during the first nine months of 2009 – the latest time-frame for which data has been published.
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Jevons' Paradox and the Perils of Efficient Energy Use | Aerotropolis | Fast Company - 1 views

www.fastcompany.com/...new-urbanism-biofuels-solazyme efficiency peak oil urban planning
shared by Hans De Keulenaer on 21 Mar 10 - Cached
  • The engine of coal's demise would be the same invention that was created to conserve it: the steam engine. But it made burning coal so efficient, that instead of conserving coal, it drove the price down until everyone was burning it. This is Jevons' Paradox: the more efficiently you use a resource, the more of it you will use. Put another way: the better the machine--or fuel--the broader its adoption.
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Pambazuka - Profits before people: The great African liquidation sale - 0 views

pambazuka.org/...60010 food agriculture africa development crisis security
shared by Arabica Robusta on 07 Nov 09 - Cached
  • So what do the world’s great investors have their eyes on in Africa, in addition to the usual natural resources – minerals, petroleum and timber – that they’ve always coveted? In a word, land. Lots of it. The land-grabbing 'investors' are purchasing or leasing large chunks of African land to produce food crops or agrofuels or both, or just scooping up farmland as an investment,
    • Arabica Robusta
      Arabica Robusta on 07 Nov 09
       
      Biofuels are not sustainable energy. They do not protect food resources.
  • At the moment, the grabbing of Africa’s land is shrouded in secrecy and proceeding at an unprecedented rate, spurred on by the global food and financial crises. GRAIN, a non-profit organisation that supports farm families in their struggles for community-controlled and biodiversity-based food systems, works daily to try to keep up with the deals on its farmlandgrab.org website.[vi]
  • Apart from the African governments and chiefs who are happily and quietly selling or leasing the land right out from under their own citizens, those who are promoting the new wave of rapacious investment include the World Bank, its International Finance Corporation (IFC), the European Bank for Reconstruction and Development and many other powerful nations and institutions. The US Millennium Challenge Corporation is helping to reform new land ownership laws – privatising land – in some of its member countries. The imported idea that user rights are not sufficient, that land must be privately owned, will efface traditional approaches to land use in Africa, and make the selling off of Africa even easier. GRAIN notes the complicity of African elites and says some African 'barons' are also snapping up land.
  • ...1 more annotation...
  • another big plan is buffeting Africa’s farmers. It’s the Alliance for a Green Revolution in Africa (AGRA), which claims it is working in smallholder farmers’ interests by 'catalysing' a Green Revolution in Africa. Green Revolution Number Two.
  • Arabica Robusta on 07 Nov 09
     
    "it was all summed up clearly for me by members of COPAGEN, a coalition of African farmer associations, scientists, civil society groups and activists who work to protect Africa's genetic heritage, farmer rights, and their sovereignty over their land, seeds and food. All these knowledgeable people have shown me that the answer is quite straightforward: many of those imported mistakes, disguised as solutions for Africa, are very, very profitable. At least for those who design and make them."
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IEEE Spectrum: How Much Water Does It Take to Make Electricity? - 0 views

spectrum.ieee.org/6182 biofuels electricity ieee water lifecycle
shared by Hans De Keulenaer on 05 May 08 - Cached
  • Remember when you were a kid and your parents made a big fuss about turning off the light when you left a room? Who knew that, besides adding to the monthly electric bill, keeping a single 60-watt lightbulb lit for 12 hours uses as much as 60 liters of water? According to researchers at the Virginia Water Resources Research Center, in Blacksburg, Va., fossil-fuel-fired thermoelectric power plants consume more than 500 billion L of fresh water per day in the United States alone.
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Al Fin: Why Not Cellulosic Electricity? Bio-EtOH vs. EVs - 0 views

alfin2100.blogspot.com/...osic-electricity-bio-etoh.html bioenergy electric vehicles electricity lifecycle
shared by Hans De Keulenaer on 02 Feb 08 - Cached
  • According to the NREL report referenced above, converting biomass into cellulosic ethanol can be done at about a 45% efficiency (i.e. 45% of the energy of the biomass makes it into the fuel.) In contrast, biomass can be converted at 33-37% efficiency [pdf] when cofired. Combining this with the 5x improvement of drivetrain efficiency that comes with electric propulsion, and the same amount of biomass converted to what I'll call "cellulosic electricity" will take a vehicle 3.8x as far as it would in the form of cellulosic ethanol.
  • Hans De Keulenaer on 02 Feb 08
     
    Makes one really wonder the agenda behind the EU's policy on biofuels.
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The transition to a Zero Emission Vehicles fleet for cars in the EU by 2050 - 1 views

diigo.com/0aqqjg electric vehicles
shared by Hans De Keulenaer on 14 Nov 17 - No Cached
  • Decarbonising transport is central to achieving Europe’s policy commitments on climate change. T ransport is expected to deliver a 60% greenhouse gas (GHG) emissions reduction target of the EU for 2050. Achieving these commitments is expected to require a complete decarbonisation of the passenger car fleet. The more ambitious COP21 commitment to limit temperature rises to 1.5°C will also likely demand a complete decarbonisation of transport by 2050.
  • Attaining a 100% ZEV fleet by 2050 will require all new car sales to be ZEV by 2035 (assuming a similar vehicle life-time as today) and a substantially faster introduction of ZEVs and PHEVs than current policy and likely 2025 policies will achieve .
  • Compared to the CO2 emission reductions targeted in the current EU plan, the transition to a 100% ZEV car fleet by 2050 will result in an additional reduction of the cumulative CO2 emissions in the period 2020 and 2050 of 2.2 to 3.9 gigatonnes. The current EU White Paper for T ransport, targets to reduce the transport emissions by 60% compared to 1990.
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  • The best option for a rapid emission reduction is to focus on BEVs rather than PHEVs whereby the EU goes directly and aggressively to 100% ZEV sales. A scenario where PHEVs are first will push the strong ZEV growth further into the future and will ultimately require a larger effort at a later time. However, the impact of (an early fleet of) PHEVs on reducing ZEV costs, increasing consumer acceptance and promoting investments in charging / fuelling infra is difficult to predict / model and may play an important role as well.
  • The “Tank to Wheel” amount of energy needed for transport will be reduced by 78% compared to today for a transition to a BEV passenger car fleet. A transition to a 100% fuel cell electric vehicle fleet will result in a 46% reduction of energy for the EU’s car fleet.
  • Around 1,740 million barrels of oil per year could be saved by 2050 with the transition to a zero-emission passenger car fleet, the equivalent of € 78 billion at the current price of 45 $ per barrel.
  • The GHGs from oil will potentially get higher if shifting to for example oil sands .
  • Purchase cost parity is assumed to be achieved in the period 2022-2026 for a BEV and a comparable internal combustion engine vehicle (ICEV), with BEVs being comparatively lower in cost after that. Parity at Total Cost of Ownership (TCO) level will be achieved 2 to 4 years before the purchase cost parity is achieved. The average TCO for a ZEV will be €0.04 to €0.06 per kilometre less than an ICEV by 2030.
  • This represents societal savings of € 140 billion to € 210 billion per year for a 100% ZEV EU car fleet.
  • A mass market for ZEV cars will create synergy for the cost competitive development of a ZEV LCV (Light Commercial V ehicles) market representing 17% of the light vehicles emissions. It will also accelerate the development of a HDV (Heavy Duty V ehicle) ZEV / PHEV market for passenger and goods transportation. It will also free up advanced biofuels for other transport sectors.
  • A lithium-ion battery manufacturing capacity of 400 to 600 Gigawatt hours will be required at the point where 100% of the passenger cars in Europe sold will be BEV . This is the equivalent of around 10 to 14 “Giga factories” representing a value of €40 to 60 billion per year for cars alone.
  • In addition, as BEVs have superior driving performance characteristics and people used to driving electric do not return to ICEVs, the transition may become demand driven once the price, range and infrastructure barriers have been removed.
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Solar Thermal Power + New Direct Current Electric Grid Could Make US Renewable Energy W... - 0 views

www.treehugger.com/...ld-renewable-energy-leader.php solar thermal networks
shared by Energy Net on 13 Jan 09 - Cached
  • Energy Net on 13 Jan 09
     
    Fred Pearce has framed his latest opinion piece in Yale Environment 360 as one about Europe fiddling around with its climate change commitment (with German Chancellor Angela Merkel as lead violin), while the US is poised to reengage with the world under the Obama administration. What it's really about though is what the US would need to do to take that lead, and it all has to do with renewable energy. Though some of this may be recap for avid TreeHugger readers, it's worth repeating: Stephen Chu Appointment a Good Sign Beyond his stated commitment to dealing with climate change during the campaign, Pearce indicates that the appointment of Stephen Chu as energy secretary is the real sign that the US could soon lead the renewable energy/climate change race. Not only has he done pioneering research on solar power, energy efficiency and cellulosic biofuels at the Lawrence Berkeley National Laboratory, he's also an advocate of a nationwide expansion of the electric grid to bring renewable energy from where it's most easily generated (west of the Mississippi) to where the greatest demand is (east of the river).
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Your Breath Could Be Recycled into Fuel | LiveScience - 0 views

www.livescience.com/...090205-breath-recycle.html harebrained
shared by Hans De Keulenaer on 06 Feb 09 - Cached
  • The Liverpool John Lennon Airport, in Liverpool, U.K., will soon become the world's first to try a revolutionary piece of technology that will recycle the breath of passengers into biofuel.
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YouTube - The Air Car - 0 views

www.youtube.com/watch biofuels carbon cars costs transport youtube compressed air
shared by Peter Fleming on 22 Dec 07 - Cached
Peter Fleming liked it
  • Peter Fleming on 19 Aug 08
     
    Nice idea, but has it got performance potential? Rotary engine impressively compact and friction free. How much emission is generated by the compression of the air? Is it just passing the emissions on to a power station?
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The Next Four Years for Renewable Energy - Renewable Energy World - 1 views

www.renewableenergyworld.com/...our-years-for-renewable-energy wind geothermal biofuels renewables electricity hydropower
shared by Richard Bernier on 26 Mar 09 - Cached
  • Richard Bernier on 26 Mar 09
     
    Podcast of the Renewable Energy World North America Conference and Expo.
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